Perhaps the most obvious attribute of design is that it makes ideas tangible, it takes abstract thoughts and inspirations and makes something concrete.

也许，设计最明显的特点就是它能够将想法变成现实，它能激发抽象的想法和灵感并使他们具体化。

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The Unique attribute implementation class extends the abstract Validator class shown in Listing 6. Its source appears in Listing 10

Unique 属性实现类扩展了 清单 6 中所示的 Validator 抽象类。

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The attribute abstract="true" establishes that this is an abstract pattern.

属性 abstract="true" 表明这是一个抽象范式。

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